<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			div {
				color: red;
			}
			div {
				color: blue;
				font-size: 12px;
			}
		</style>
	</head>
	<body>
		<div id="">
			层叠样式表
		</div>
	</body>
</html>
